definisi
asal
panemu
Etimologi
kelas
sub-kelas
group
kategori liyane
rhyolite punika rock igneous nggoleki-grained kang sugih ing silika
saka rhyolit german, saka stream lahar greek rhuax + watu lithos
rock grained coarse, rock opaque
obsidian punika kaca vulkanik alami kawangun minangka rock igneous extrusive. diprodhuksi nalika lahar felsic extruded saka gunung mbledhos ndingin kanthi cepet karo wutah kristal minimal
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
awet rock, medium atose rock